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Sept.‘ 24, 1946.
i
v, E_ SPROUSE
2,408,347
WORM ADJUSTING DOUBLE WRAP HOSE CLAMP
Filed July 19,1944
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2 Sh‘eefcs-Sheet l
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IN VEH TOR,
Verngr E, JPr'qqJe)
Sept, 24, 1946.
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» ‘v. E. SPROUSE
2,408,347
WORM ADJUSTING DOUBLE WRAP HOSE ,CLAMR
' Filed July 19, 1944
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/ 2 Shéets-Sheet 2
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'BJ Mam,‘
Patented Sept. 24, 1946
4.: . ._ _ _
* 2,408,347
‘UNITED STATES PATENT OFFICE"
.WORM ADJUSTING DOUBLE WRAP
.
HOSE CLAMP
~~
Verner E. S‘prouse, Columbus, Ind.
Application July ‘19, 1944, Serial No. 545,559
(01. 24_19)
4 Claims.
1
2
ing it into a smaller effective diameter.
‘
.
' the slot I3 outwardly and over the strap 9 with
theothe'r end I8 of the band carried thereunder.
This invention relates to a hose‘ clamp of a
double wrap type with a worm screw for draw
This wrapping and" general design of'the clamp
'
strap with exception of its ends conforms to the
disclosure of the strap in my Patent No. 2,363,206,
for hose clamps. The end I8 is carried upover
slots provided in the heretofore worm screw type
the floor I9‘ of a bracket generally designated by
clamp; to eliminate a fixed radius bearing mem
the numeral 20, and inside of the bracket and
ber on the» hose and to put the entire band parts
then down through a slot 2| and turned around
which touch the hose in tension; to eliminate
any tongue part under compression; and to re 10 under the remaining portion of the ?oor I9 ex
tending to the_ left, whereby the end I8 of the
duce thetendency of backing oif of the worm
band is bent through that slot 2I to form an
screw under vibration particularly such as is en- 7
abutment therewith. That band end I8 may
countered in aeronautical conditions.
>
'
The primary objects of the invention are to
eliminate extrusion of hose rubber through the 7
I These and other objects and advantages of the ' I also be spot welded to the ?oor I9 if so desired
15 to secure the necessary attachment strength.
invention‘ will become apparent to those ‘versed
in the art in the following description of one
particular formof thein'vention as illustrated in
the accompanying drawings. in which
I
Fig. ,1 is a view- in side elevation in partial
section of a structure‘embodying the invention;
‘Fig. 2, a view in tongue end elevation;
a
Fig. 3, a; top plan view in partial section;
Fig. 4, a view in back elevation; and
1
f
‘ Fig. 5, a developed view of the band used to
form the clamp.’
'
Like characters of reference indicate like parts
throughoutthe several views in the drawings.
.20
The ?oor‘ I9‘ of the bracket 29 rests on top of
the outside of that part of the band which ap
pears under the band end I8, both the floor I9
and the end I8 being free to travel circumferen
tia-lly'.‘ The part" ‘I of the band 9 under the end
[8 and'the bracket ?oor I9 is that part of’ the
‘band which'has a full width- and lies between
the inner end of'the‘ tongue I0‘ and the beginning
of the narrow portion I2‘ at the other end of the
slot I3'r’emoved from the end of the slot I3 from
which the tongue I0 emerges. The tongue I0
enters the-bracket 20 from the left side, Fig. 1,
' Referring ?rst to Fig. '5, a length of strap
through an" opening adjacent the floor I9 and is
metal 9 is formed to the shape as indicated
wherein there is a tongue portion I 0 having a
wrapped around,v s'lidingly thereover and over that
part of the band; which is carried on the top side
plurality of slots or abutments II therethrough
of the floorl'il; this part 5 being the one which
which will serve to receive the thread of the
carries the slot ‘I6. ' The tongue extends‘ on
worm screw as will later become’ moreapparent.‘
As indicated by‘the drawings, the tongue I9 is
made to be the full width of the strap 9 but im
mediately back of the tongue I0 there is a re
through the bracket 20 through an opening 5 at
its under right hand side above the floor I9 to
extend freely over the other part of the band
thereunder.
duced width portion I2 which is provided to enter
through the slot‘ I3 of a widened portion I4 at
The floor I9 of the bracket 20 has upturned
sides 22 and 23, Fig. 2,, between which the upper
the other end ofthe blank or strap 9.
part of the bracket 20 ?ts and is secured in any
Where
-
the diameter of the clamp is'to' be rather'large, .40 suitable manner, such as’ by welding or brazing.
such asabove two inches, itis ‘preferable to em
ploy a tie I5 across the slot I3 in order to pre
vent displacement of the narrow length I2 par
A wornr'screw' 24 is carried by the‘ bracket 20
bybearing: portions 25 and 26 to have the thread
Z‘Ifeng‘a‘g‘e with the slots‘ I I' of the tongue II). The
ticularly in shipping, storage, and during'the ap
slot" I6 appears immediately under these threads
plication of the clamp to the hose. Then toward 45 2‘!v and‘ under the tongue In in order‘ to provide
sufficient clearance for the threads as they may
the end I8 of the blank 9 removed from the
tongue end‘ is a short slot I5 which is provided
extend through the thickness of the tongue III.
The right hand end of the worm screw 24 is pro
for worm screw thread clearance and which
will be located in the formed clamp under the
vided with a slotted head 28 whereby the screw
slots II.
50 24 vmay be rotated by means of a screwdriver in
The strap 9, as shown in Fig. 5, is wrapped
order to advance the tongue I9 circumferentially
around into circular form as indicated in the
around through the housing 20 and thus reduce
other views of the drawings to have the reduced
the effective diameter of the clamp itself.
width portion I2 rest'over the tie I5 within the
Under some conditions, the hose clamp may
slot I3 and have the tongue end In pass through 55 have to be located in such a position that the
2,408,847
3
4
.
‘screw head 28 is not positioned properly to be
reached, and in order to provide for that con
tingency, the bracket 28 is provided with a stub
2. A hose clamp comprising a hose wrapping
band circumferentially wrapped to extend twice
around the hose, the band having overlapping
shaft 29 entering from the top side 4 through a
ends; one of said ends being provided with a
series of abutments therealong; a bracket to
bearing 3 provided ‘by the bracket and having a
which the other of said band ends is secured;
said bracket having a member circumferentially
riding on said band spaced between said ends;
said one'end extending over said bracket mem
ber; and a worm rotatably carried by‘the bracket
and having a thread engaging said end abutments
for pulling the entire band under tension be
tween said ends to reduce its e?ective diameter;
lower bearing 30 carried in a cross bracket 31
within the bracket 20‘. The shaft 29 carries a
bevel gear 33 within the bracket 20 which is
in constant mesh with a bevel gear 34 ?xed to
the shaft or the worm screw 24 adjacent the
bearing 25. The external end of the stub shaft
29 is provided with a head 35 herein shown as
both slotted and hexagon in shape in order to
said other band end extending over said bracket
member under said one end to provide a sliding
surface for circumferential travel therebetween,
permit its being turned either by a wrench or by
a screwdriver.
7
Since the end I8 is anchored to'the bracket
20, and the ?oor I 9 of the bracket 20 rests on
top of a part of the hose clamp band and can
not come into contact with the 'hose itself, the
band itself may conform to all of the irregulari
ties and differences in wallv thicknesses of the
and down through an opening in said bracket
member and along thereunder to ride against
said band.
3. A hose clamp comprising a hose wrapping
band circumferentially wrapped to extend twice
around the hose, the band having overlapping
ends; one of said ends being provided with a
hose being clamped, and all of the band is placed
under tension without any part thereof being un
der compression, such as has heretofore been the
case in many other designs of the prior art where
series of abutments therealong; a bracket to
a bearing plate is provided with a ?xed radius
' said'bracket having a member circumferentially
which the other of said band ends is secured;
to rest directly upon the hose._ Also since the
riding on said band spaced between said ends;
clamp wraps twice around the hose, it has twice
the mechanical advantage with more pressure
exerted on the hose under reduced torque in the
said one end extending over said bracket mem
30
' worm screw, all of which means that under vibra
tion conditions, there is much less possibility of
the worm screw 24 backing up to release pressure
on the hose.
ber; and a worm rotatably carried by the bracket
and having a thread engaging said end abut
ments for pulling the entire ‘band under tension
between said ends to reduce its e?ective diam
eter; and means carried by said bracket having
' an operating member angularly disposed from the
I
Thus, it is to be seen that the invention pro 32 wk axis of said worm thread for revolving the worm.
4. A hose clamp» comprising a hose wrapping
vides a hose clamp wherein the encircling band
band circumferentially wrapped to extend twice
is entirely under tension without any portion
thereof being under compression, and further,
around the hose, the band having overlapping
the band is so designed that even though the
worm screw mechanism is employed, there are no
ends; one or said ends being provided with a
series of abutments therealong; a bracket to
which the other of said band ends is secured;
said bracket having a member circumferentially
riding on said band spaced ‘between said ends;
holes through which the hose may extrude to
cause not only damage to the hosebut to re
sist further takeup of the clamp.
‘
’
While I have herein shown and described my
invention in the one form as now best known L,
to me, it is obvious that structural variations may
be employed, particularly in they design of‘ the
bracket 28, all without departing from the spirit
of the invention, and VI,.therefore, do notdesire
said one end extending over said bracket mem
ber; and a worm rotatably carried by the bracket
and having a thread engaging said vend abut
ments for pulling the entire band under tension
between said ends to reduce itse?ective diam
eter; and means carried by said bracket hav
described beyond the limitations as maybe im--'
ing an operating'member angularly disposed from
the axis ‘of said wormlthread for revolving the
posed by the following claims.
worm; said bracket carried means comprising a
to be limited to that precise form as shown and
I_
claim:
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1. A hose clamp comprising a hose wrapping
band circumferentially wrapped to extend twice‘
around the hose, the band having overlapping
ends; one of said ends being provided with a
gear system interconnecting said worm and said
operating member; the axis of‘said worm thread
being substantially parallel to a tangent to said
wrapped band; and said operating member ex
tending externally‘ of said bracket and having
its axis substantially normal to that of the worm
thread; said gear system consisting of a gear
?xed to said worm, and a second gear meshed
60
with the ?rst gear and ?xed to said operating
member," said operating member having a bear
said one end extending over said bracket mem
ing in an outer portion of said bracket outside
ber; and a' worm rotatably carried by the bracket
of'its attached gear; and a crossbar within said
and having a thread _engaging said end abut
bracket carrying an inner end of said operating
ments for pulling the entire band under tension
member.
s
between said ends to reduce its effective diam
series of abutments therealong; a bracket to
which the other of said band ends is secured;
said brackethaving a member circumferentially
riding on ‘said band spaced between said ends;
eter.
‘
'
‘
VERNER. E.‘ SPROUSE.
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